For example, where records of poetry competitions in notable households are harvested, only a period and the location may be known; these poems may be valuable if referenced by masterpieces from the same or rival literary group.
[1] The original encyclopedia, encompassing only Japanese poetry, was compiled by Matsushita Daisaburo and Fumio Watanabe and published between 1901 and 1903.
The reference numbers for these volumes continued in sequence but are marked in referencing with zoku Kokka taikan.
The current 2nd edition, published in 2012, is expanded with reference number continuing in sequence and is available on DVD-ROM.
The Kokka taikan can be viewed as the miscellany, aiming to contain poetry outside the long established collections: